UNIVERSITAT POLITÈCNICA DE VALÈNCIA Desarrollo ... - RiuNet

132 IV.Resultados y discusión. Capítulo II
20 +1 +1 +1 +1 9.28
21 0 0 0 + 8.67
22 -1 +1 +1 -1 9.11
23 0 - 0 0 9.46
24 -1 -1 -1 +1 9.28
25 +1 -1 +1 +1 8.21
26 0 0 0 0 8.08
27 0 0 0 0 8.26
28 +1 +1 -1 -1 8.32
29 0 0 0 - 8.54
30 -1 -1 -1 -1 9.83
31 -1 -1 +1 +1 8.15
*Factors X 1 , X 2 , X 3 , X 4 and Y stand for Glucose: 1-2 g/100 mL; Fructose: 1-2 g/100 mL;
Inulin: 0.7-1.3 g/100 mL; Inoculum: 3-4.5 mL/100 mL; Probiotic counts (log cfu/mL),
respectively.
Results from the 31 runs were fitted to a second order polynomial
equation and the removal of non-significant terms (p > 0.05) was applied,
except when the elimination of such terms decreased the explained variance
(R 2 adj). The goodness of the fitted model was evaluated through an analysis
of variance, mainly based on the F-test and on the R 2 adj, which provide a
measurement of how much of the variability in the observed response values
could be explained by the experimental factors and their interactions
(Granato et al., 2010). Table 2 summarises the estimated regression
coefficients of the second order model obtained, in which fit parameters
from the analysis of variance are included.